Support added for Gnu C++ under Solaris.

Make/makedefs

@@ -91,6 +91,43 @@ RECURSIVE_TARGETS = \
 #### SUN OS Specific definitions
 ifeq ($(OS),SunOS)
 
+#### if useing g++ on a sun
+ifeq ($(COMPILER),gnu)
+
+  C++               = g++
+  DEPARG            = -M
+  INC               += -I/usr/local/glut-3.7/include
+  DEF               += -W -Wall -fPIC -fpermissive
+  OPTF              = -O2
+  DBGF              = -g
+  SHARED            = -shared -fPIC 
+ifeq ($(ARCH),64)
+    ARCHARGS          = -m64
+else
+    ARCHARGS          = 
+endif
+  LINKARGS          =  
+  DYNAMICLIBRARYLIB = -ldl
+  OSG_LIBS          = -losgGLUT -losgGA -losgDB -losgUtil -losg 
+  FREETYPE_LIB      = -L/usr/local/lib -lfreetype
+  GLUT_LIB          = -L/usr/local/glut-3.7/lib/glut -lglut
+  GL_LIBS           = -lGLU -lGL 
+  X_LIBS            = -lXext -lXmu -lXi -lX11 
+  SOCKET_LIBS       = -lsocket -lnsl
+  OTHER_LIBS        = 
+  TIFF_LIB        = -ltiff
+
+  INSTBINCMD        = cp
+  INSTDEVCMD        = cp
+
+  INST_SYS_PREFIX   = /opt/OpenSceneGraph
+  INST_SHARE_PREFIX = /opt
+
+  MAKEDIST          = $(TOPDIR)/Make/makepkg
+
+#### using forte compilers (default)
+else
+
   C++               = CC
   DEPARG            = -xM1
   INC               += 
@@ -123,6 +160,8 @@ endif
   MAKEDIST          = $(TOPDIR)/Make/makepkg
 endif
 
+endif 
+
 #### IRIX Specific definitions
 ifeq ($(OS),IRIX)
 

src/osgPlugins/dx/DXWriter.cpp

@@ -129,15 +129,15 @@
 #include "StateSetStr.h"
 
 #if defined(__sgi) || defined(__FreeBSD__)
-	#include <unistd.h>
+    #include <unistd.h>
     #include <ieeefp.h>
 #else
     #include <math.h>
     #if (defined(WIN32) || defined (macintosh)) && !defined(__CYGWIN__)
         #include <float.h>
     #else
-		#include <unistd.h>
-	#endif
+        #include <unistd.h>
+    #endif
 #endif
 
 #if defined(WIN32) && !defined(__CYGWIN__)
@@ -603,6 +603,8 @@ inline int IsNaNorInf( float f )
   }
 #elif defined(__FreeBSD__) || defined(__linux) || defined(__CYGWIN__) || defined(__DARWIN_OSX__)
   return isnanf(f) || isinf(f);
+#elif defined(__sun)
+  return isnan(f);  // KLUDGE - hack to get this to compile w/g++. 
 #elif defined(WIN32)
   return _isnan(f) || !_finite(f);
 #elif defined(__hpux__)